Suction burner



Feb 12 1924; mmia O J.HHUNT.

SUCTION BURNER Filed April 2 1922' 2 sheets-Sheet l FRG/*1 FUEL NELL Feb i2 i924L 2 Sheets-5heet 2 L H; HUNT SUCTION BURNER Filed April 20 l Q hun. w .Rbwywq bmx. o3 .nu fom. mw

lmetenteel Pelo. l2. i224,

.me v .lili-As We trl;

To NZZ vwhom t may concern.'

lie it known that l, Jorim l-i. HUNT, n citizen ol' the United States ot America, residing; et Dayton. county ot' llilontgomery, Stute ol Ohio. have invented certain new und i useful improvements .in Suction Burners, oit which the following is n full.l clear, end-exnct description.

This invention relates 'tol apparatus for preheutinpy engine 'fuel mixtures such as supplied by curburetors in order to facilitate engine startingA especially in cold weather.

lt is u object of' the present invention to upply heated combustion precincts' from a liquid fuel burner directly to the air going into the carburetor and particularly to up ply heut es close es possible to the esrhuretor jet. ln carrying out this invention l employ e. liquid iuel burner which is operated by engine suction und consumes engine iuel7 the fuel heine; conducted to the hurner preferably direetlji.7 from the i'uel bowl. i

A further object is to control the burner suction uutonniticzilly so :is to restrict its range ot' variation in order that the operan tion of the burner muy not substantially -intertere with the operation oi' the engine. further olii-eet is to supplement. this autoniutie control with n inununl control by ineens ol which the ruteo't" combustion ot' the burner muy he varied ut vwill.

A. tui-ther object is to provide u manuel control hy menus of which the burner muy be rendered inoperative.

further object is to provide ineens for compensating tor the eileel ou the engine fuel mixture hy the discharge ol exhaust ruses from the burner into the carburetor intake. lt is the nini ot' the invent-ion to keep the proportions of Ithe engine 'fuel mixture as nearly (onstunt :is possible.

(lther und Jfurther objects otx the present invention will he apparent troni the tollowing description. reference heilig):y hud to the. accompanying drawings. `wherein u preferred embodiment. ot the present invention is clearly shown.

ln the drawings:

Fic'. l is a sectional View of a carburetor and apparatus for heating the intake there. ot' which is constructed in accordance with the present invention:

Fig'. 2 is s pien View partly in section of the apparatus shown in Fig. l; und

Fig. 3 is :i chart includingcurves which represent variation in suction. in different parts of the apparatus.

In the drawings. 2O designates the intake manifold oi the engine provided with e pessewe 2l which lends to the various cylinders of the engine not shown. To the manifold 2O is secured a. carburetor 22 byinesns of bolts 23. Carburetor l22 may be of any type which is adapted to handle the usuel automolillel fuels. For purposes ot illustration the Hudson type of carburetor is shown, this eerlniretor being one used with e Wellknown maire ot automobile. Carburetor 22 includes u horizont-el passage which comprises an intake portion 24, :i nozzle chamber 25 and e. throttle chamber 26. lirectly over the nozzie chamber. 25 is located e. cylinder 27 in whichv reeiproestes e piston 28, the movenient ot' which is produced. by variations in engine suction, the cylinder 27 losing in coniinunication with the throttle chamber 26 through o. passage 29. To the piston 28 is attached e metering;- pin 30 hating u tapered metering; groove 3l. T he lrooved portion ot the pinv() projects into a. nozzle 32 which is adjustable vertically by means of s lever 33. transmitting motion to the nozzle 32 through :i shaft 3e' carrying o. gear, not shown, which meshes with a rack 35 formed on the nozzle 32. The pin 30 and nozzle 32 nre in communication with s. fuel well 36 into which fuel is delivered through e. pi e 3? from e. tuel howlv 38 provided with t e usuel type ot iloat control vulve which limits the quantity ot fuel delivered to the howl lfrom au outside source. As the action of this type ot carburetor is wel -known in the nrt. tin-ther description thereof is considered unnecessary. it is sulicient to state that. the suction in the cylinder 27 increases with the openingr of the throttle valve 2G. the piston 28 will litt the metering pin 30 und `control the throat of the nozzle chamber 25 in such e manner as to tend to eiieet substantially constant fuel mixture proportions over n Wide variation of engine speed.

The carburetor intake 2l is in direct coinmuniczition with a regulating chamber 4U provided in a regulutor freine li which is miiinziining; the

' giwiiied im the; pmi membfei ne vpper and of cyiinder 5 supporis ai iwf which is v Rod 'T3-S is siicizabie Within a be? *upg pioif'ified my a bess suppoi-efi cenizwwij; S iii@ apm'tiu'a 7() by means of spaced 75. Vaive' T2 is norimiiiy heid in yieiiengagement wiih die; fesait 71 by means mi@ spying 76 invzposeci bieween the uppe @mi of ich@ bos@ 74 :imi a. waahei Y? retained mimi fiile upper @mi die. @ai T3 by miauw by @2. Burner 82 comprse ii barrial S3 Wiiizh :is aitached ha fiumi@ m :my

I wa he fuel jet chi-miba? 8.

ssrbe this meieriug weil. For' *im purpose of discng the pesen; inven on, it is hough Suiicen to stai@ @hat the metering well provides reizitiviy x'ich'mixtui'e uf :fuel .and air which 1viii iight' readily by means of an eiectric spark, sind the metring we Qi'ovides iiat the pioportions of iii? and fuel in ihis @ich iiggiitng mixture Shai Feminin ,Substfntiaiy constant over a Y viiiaiun ai engine sucinzi.

is this. mixture, enters tha nozzie 89 it sapame itself. diie i@ iii@ action oi' gravity, into lighter and hem/'im' coiisitiwnts, the heavier poi'iion ii'icfidiiig down the ziimuim' passage QQ which suzrouiidg die nozzle in# Sert Q1, while iii@ iigiiicr cmistimwns pass hrough holes 92 iufm the Centwl passage 93 of the. inseliii. Tiieso iightcr portions of the uei ,mixture meer with the heavier poiions coming Qu wween the iower and O 'die insei 'i and the zinzzie member 89, 'an'.i assist iii biboziiiig up tiw iiiei into simili paiticieg. as it passes out, iiii'ougii the m0152113 @rif This imei niixure is ignied by Spak passing zicius tho poilitg 9:3 :md 9G of iw spark pirg' 9T, produuing Ham@ which3 fine to iii@ suction of the engine, is caused to project t'seifthl'ough the combufioii chamba? 31 and' the iimiefi carbon p rudes :ire caused in be commi/med by Oxygen and the alii' entering iiie chamba? mcmgh 110105; 95% imifiiiig into iii@ chamber iiiioiigh the insert 85 from an ai? diS- iribiiiiigr ciimiim" (iizunbei: 99 is in communication wiiii outside Anir tiimugh tim passage 100 which leads around time nnzze member S9 und h@ quantity (if air enieingf he passage 10G is cmiigioiied by means of :i screw 10i. l@ designates ai mica Winow for observing the character si' he iam. '1.03 iefsigmm :i plug providing; a, puddiu cavity im. fu aus@ ihre humm* i005 not iight readily iiquid fuel Fiom me nozzle S9 may coiieci; in this caviry lO/. Due to iie sucn cion ci. @ce engin?, air will Qnei imno; hiii This ypa of iiburner 'is desaieai and claimed in the Copsiidlng: appiicfi-igii 0i" Jolijn Hum; John 'E2 F' zsimmamf and @Gorge if". .Enbsho Seiiai info. Leeg, ed Juiy 12? 1921, and i5 isthougii'; thai, 3711i her desciiptimi is unnesessmy. 3ft is to be undeiseod hat nher types of Sucimi bumcmi., be used in connecioii Wiish. Lize regw I appnmus descrbe iam@ the burner uci.

-an @mani nhfi the Env-fel Gitan from the chamba? SC thiuugh Siizfail who 110, gireierhly a, quarte Qi :in inch iii inletml diameter v'liiil ,fla in@ they intake i' mail in lle humm? l buamn for Mating sages sufficienti? 2 5?. Shall cmilrol i1 minimi 'ihub yimg@ humifiaif Suclimi will he qui Deseas-mjy e bummer si The ou f sucimi m Elm- 49 engages the wd. "$3 and pushes tha "valve 72 ops-h. Ey having the chamber i? open t0 amosphem hrmigrh @he ielaimly large Gpenigs al; the top and bottom of' lie Hume 4L pracicaily im suciimi will be placed riposi the burner 82 and fhiaiefoe im fuel will he slm-lied up thrmigh the nrw/file S49.

n @Lasa haci; 'ffm iihimlg'h tha cmbiu'etary lle Valves as a what? miv@ am? lfhe engine, tha Suclimi the flame jmm- The varia imis in Sucion in lh@ nozzle portion 0'? tie carburetor, The mmv@ (l wpwsens 1h@ vauiniiiii in engine Suiimi heween h@ i'hr'ulil'ie valve 26 mul 'lie engine iiinle as hifs vulve; open, and the curve D ivpxe- Sants the van-iaion in sucifm wihin the cai'- lnueor hewl. These sucl'ifm cuz-V05; me :lll ",iclae boexernal anmsphen-x lt is (herem'e :ippzireu that the lfm-00 which muses liquid fuel to flow from th@ hmvi 238 lhi'rmgh ih@ wyll and up through the now/cle 32 im@ he nozzle Qhamhm 25 is :hw tn lh@ lifiiezence in suction ri-pi'esilmell hy he curves cut-rv@ B represents l'h cm'rffspmuling' .L L

B end Now if iie carburetor bowl 38 were merely oonneeed with the ini'olie 24 of lie carbnreifiir, dien it is apparent that -he Suction in the bowl would be represented liv the curve Since curve Si' is steeper risen curve D, it is evident that the diii'erenee in pressure which causes fnel to iiow up through the nozzle would not inereeserwitn sniieient iepidity With increasing loud so inzit the fuel inisure wouid tend 'to run lean :is 1he engine load increases. By adjustment of the needle valve ,E263 ille pressure in die carburetor Hoei: bowl 38 een be mede to very ueeording to the curve D soi'lizi; the' rete of increase in pressure diiierf emes between tile iowl pressure und pressure iii' the nozzie chamber, wili be sniiieientif; 'rapid io eoinpensnie for any leuningT oi the foei minime proportions which might otherwise occur as the engine. ioed incl-enses.

ii is 'to be understood flint iiie curves .shown in iiig. 3 are .noiI to bonken indieaing t ie enact' nutrire of suction variations in ille speeiiie forni of apparatus disclosed bui are given by -Wey of example' to show' zipproximaeiy the releive variations in suction at different points oi the apparatus.

ii/'iiiie 'die form of mechanism herein shown and described eonsitutis ii preferred form of embodiment of ille invention. it is to be understood that other forms might be edopied, ziii eoming Within the scope oi 'die eliiirns which folio'w.

iiiiiat i claim is follows:

l.v in e fuel vaporizing device, the coni.- binetion with en engine having en intake; of n eerimretor connected therewith; e suetion operated iiquid inei burner 'discharging` ino the oorbnrecor for heating the saine; und me. or automatically restricting` lie variation of burner suction to s range less ifiien iiie range eff engine suction.

in s ifiiei 'mperizing device., the coinioineiion wish en engine having sn. intsle; of ai ezirbnreior connected iiiereWit-ii; e siicrion operated liquid fuel burner discharging into die carburetor for heating ihesa-ime; and ineens for entomaieeiiy resricting the variation of burner suction to a range iess than the variation in engine suction: end manually oper-sied ineens for conroiiing seid niomeiie means io very the rate of burner combustion.

in e fuel vaporizing device, the confi-` iiinstion Lwith en engine having en intake; of a carburetor i'ion .operated liquid fuel burner discharging iiio the' Carburetor forl iieeiing he saune; end .means for eujtonieticeliy restricting ehe of burner suction to e range ?.ess time the variation in engine sneden; and inzininiiiy opereeci means for eoniroiiing said entometie ineens to burner eomiiusiion and. Afor rendering the bnr f inopereiife.

engine Connected therewith; e snc- ,reieiiiveiy Wide 'very the reifel of 4i. in a iuei veporizing device7 die corebinziiion wiih an engine having en ineie; oiE a eeriinre'or connected therewith; a liquid 'i'icei burner for heating the carburetor; Seid burner being operated by carburetor inifeiqe sneion; :ind ineens for reducing carburetor inmite suction 'below such :i value that the burner ceases to operate.

5. in a fuel if'uporizing dei/ice. the. eo1nbinaion with en engine having an intake of i carburetor iiquid foei 'burner-for heating tor,- sed burner being' operiied by carburetor intake suction-g for regiilefting carburetor inieke sncf/ion whereby iiie range of verieion in iie rete or", burner eonnb-ini1 Lion Wiii be restrioied io e veine iess innen die variation in engine suction; andl ineens for eonarolling Said regnieing means io 1 iiie refe of burner combustion.

in e. foei veporizing device, the comliinaiion with an. engine inn-ing an iniake; oi' a esrbnreer eenneeted therewith; n liquid i'nel burner for heading iiie Carburetor; seid burner being' operaie by carbnreor inake sneiion; means for regulating Carburetor intake suction whereby the range of veria tion in the burner combustion 'Wiii be restricted t0 e 'velue iess than the varisiiion the carburein engine sneiion; and ineens for controlling seid regulating means o vary tile raie of imi-ner comlnistioni, and to reduce carburetor ini'iilie suction iieiow suoli a 'veine that the burner ceases to opere-te.

7. in ii. foei viiporizing device, the Cornlfiiizition with an engine having zzn intake;

of a eari'iureior Conneeied iierewith; s. iiqnidiiiel burner for heating the eerinreor in miie; seid burner being' operated by een lmreior intuire suoiion; and :means for come penseting for. die de very of burner produ nets io 'iie ceri'inreor whereby the proportions of oxygen and imei supplied io tire.,

remain subsan'iaiiv engine iiiaie will eonsient over rein. engine load. n 8.. e fuel if'ajporif/Lingf device, ilie coniliiiniion Wiili en engine having' en insie; of e ceriiureor eonnected lierewiii; e liquid fuel burner for heating the 'Carburetor intake, seid burner being;A operated earliureior intaie suction ingV the delivery oi foei from iie carbiiretor bowl through die carburetor fuel nozzle, Said ineens ,including provisions for conipenseiing' for i-lie diiu'ing oil :iir by the burner produces whereby iiie proportions of oxygen and. fuel supplied to the en i miste Wiii remain substantially consi range of engine lo 9. in i fuel veporising devioe5 iinetion wiii en engine having oi" :L carburetor connecte-d A "die iiquid nei burner for heating the intese, seid burner being operate-i by een ,iveijyj wide range of intake g ii'zii; e

eei Brei/er conneeed therewith; z1-

Sil

g und ineens eonroii 'of a Lunaire buretor intake suction; and means controllingthe delivery of fuel from tlie carburetor, bowl through the carburetor fuel nozzle; said means including provisions for increasing tbe rate of iiow of'fuel through said nozzle in such. proportions as to compensate for the tendency ot' the fuel air mixture to become lean with increasing engine load..

10. in a fuel vaporizing device, the coin biriation witli an engine having an intake; carburetor connected therewith; a liquid fuel burner for heating the carburetor intake.` said burner being operated by carburetoi' intake suction; and a by-pass from the carburetor intake to tlieengine intake and connected wit-li the carburetor bo'wl for controlling the deliveryv of fuel from the carburetor bowl through the carburetor fuell nozzle and including provisions for increasing the rate of tiow of fuel through said nozzle in such proportions as to compensate for the tendency ot' the fuel air mixture to become lean with increasing;r engine load.

il. ln a fuel raporizinp; device. the coinbination with an engine havinf:r an. intake; of a carburetor connected therewith provided with an intake and a fuel nozzle; a suction operated liquid fuel burner; a regulator located between the. burner and car# buretor intake for automatically restricting' the variation ot burner suction to range less than the variation in engine suction; and a conduit extending through Said regulator and aloneV the bottom of the carburetor intake fory conducting the products ot, combustion troni the burner burctor intake, said products ot eoi'nbusion inipingingg' upon the fuel collected alongt the bottonrof the carburetor fuel passage.

12. in a fuel vaporizing device, the coin bin-ation with an engine lia-ving an intake; ot' a carburetor connected therewith; a suetion operated liquid -fuel burner discbarging' into the carburetor for heating the saine; a regulator located between the burner and laii'iuretor for automatically restricting the to the cai-,

operation of said manual ineens for render;I

ing the burner inoperative. f,

' i3. n a fuel vaporizing device, the co1n bination with an engine having an intake;

ot carburetor connected therewith; a suc! tion operated liquid fuel burner discharging: into the carburetor for heat-ing the saine; a regulator located between tbe burner and carburetor and provided with a plurality ot valves normally closed to atmosphere, one ci said valves being' automatically controlled .b v engine suction tor restricting the varia:

tion of burner suction to a range less than the variation in engine suction; andinan'ually operated means for controlling said valve to vary the rate of burner combustion and for operatingIr the other of said valves to render the burner inoperative.

le. In afuel vaporizing device, the coinbina'tion with an engine having an intake; of a carburetor connected therewith provided Witli a fuel nozzle; a liquid fuel burner for heating the carburetor intake, said burner being operated bycarburetor intake suction; and a by-pass from the carburetor intake to the engine intake and connected with the carburetor bowl and provided with an adjustable needle valve land a restricted passage for controlling the delivery of fuel from the carburetor bowl through the carburetor fuel nozzle and for increasing the rate ot How of fuel through said nozzle in sueli proportions as to compensate for the tendency of the fuel air mixture to become lean with increasing engine load.

ln testimony whereof hereto alix my signature.

l JUHN H. HUNT.

`itll'itnesses:

iivin A.. Gniinnwann, LLoYn M. Kraemer. 

